Potassium Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil
Abstract
Considerable research has been conducted in central Iowa to study potassium (K) fertilization rates and placement methods on corn and soybean grain yield, K uptake, and soil-test K values. However, no research has investigated K recycling to the soil by maturing plants and crop residue until the next crop is planted. The amount and the timing of the K recycled to the soil should have a significant impact on soil-test K values, and should explain a great deal of usually very high soil-test K temporal variability. Therefore, plots of several field K trials in central Iowa were used to investigate these issues.
Keywords: RFR A12129, Agronomy
How to Cite:
Mallarino, A. P., Oltmans, R. R. & Fiscus, M. W., (2013) “Potassium Effects on Yield of Corn and Soybean and on Potassium Uptake and Recycling to the Soil”, Iowa State University Research and Demonstration Farms Progress Reports 2012(1).
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